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Cognomen Franzo (Franzo , فرانسو) , throughout the world, is quite a rare last name. The cognomen Franzo is characteristic of Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and Brazil. Measured by absolute frequency, it is commonest in Italy, Brazil, and the United States. Much less frequently, Franzo is the forename as well as the last name.